根据spring配置文件的 PropertiesFactoryBean和 PropertyPlaceholderConfigurer可以选择不同的加载方式,我是使用System.setProperty(key, value),代码中可以直接用System.getProperty(key)取value的值
一、PropertyPlaceholderConfigurer
PropertyPlaceholderConfigurer是解决 properties 文件占位符问题,实现 PropertiesLoaderSupport 类
<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> <property name="locations"> <list> <value>classpath:jdbc.properties</value> <value>classpath:redis.properties</value> </list> </property> <!-- 忽略不可解析的 --> <property name="ignoreUnresolvablePlaceholders" value="true" /> </bean>
package com.phil.common.prop; import java.util.Map.Entry; import java.util.Properties; import org.apache.log4j.Logger; import org.springframework.beans.factory.InitializingBean; import org.springframework.stereotype.Component; /** * 加载Properties文件 * @author phil * @date 2017年8月13日 * */ @Component public class InitializingProperties implements InitializingBean { private static final Logger logger = Logger.getLogger(InitializingProperties.class); /* * (non-Javadoc) * * @see * org.springframework.beans.factory.InitializingBean#afterPropertiesSet() */ @Override public void afterPropertiesSet() throws Exception { Properties props = new Properties(); props.load(InitializingProperties.class.getClassLoader().getResourceAsStream("test1.properties")); props.load(InitializingProperties.class.getClassLoader().getResourceAsStream("test2.properties")); for (Entry<Object, Object> e : props.entrySet()) { System.setProperty(e.getKey().toString(), e.getValue().toString()); logger.info(e.getKey().toString() + "---" + e.getValue().toString()); } } }
二、PropertiesFactoryBean
PropertiesFactoryBean 是PropertiesLoaderSupport 直接的实现类
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="location"> <value>classpath:portal_dev.properties</value> </property> </bean>
package com.phil.common.prop; import java.util.Map.Entry; import java.util.Properties; import org.apache.log4j.Logger; import org.springframework.beans.factory.InitializingBean; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; /** * 加载Properties文件 * @author phil * @date 2017年8月13日 * */ @Component public class InitializingProperties implements InitializingBean { private static final Logger logger = Logger.getLogger(InitializingProperties.class); @Autowired private Properties propertyConfigurer; /* * (non-Javadoc) * * @see * org.springframework.beans.factory.InitializingBean#afterPropertiesSet() */ @Override public void afterPropertiesSet() throws Exception { for (Entry<Object, Object> e : propertyConfigurer.entrySet()) { System.setProperty(e.getKey().toString(), e.getValue().toString()); logger.info(e.getKey().toString() + "---" + e.getValue().toString()); } } }